vending-machine/software/src/MyMQTT.cpp

#include "MyMQTT.h"

#include <AsyncMqttClient.h>
#include <ArduinoJson.h>

#include "hardware.h"
#include "shelf.h"
#include "wifi.h"
#include "led.h"

using namespace std;

extern Shelf* shelf;
extern Wifi wifi;
extern Led led;

MyMQTT::MyMQTT(void)
  : host {mqtt_server},
    port {mqtt_port},
    username {mqtt_username},
    password {mqtt_password}
{}

extern "C" {
static void onMqttMessageWrapper(char* topic, char* payload, AsyncMqttClientMessageProperties properties, size_t len, size_t index, size_t total) {
//  static_cast<MyMQTT*>(parm)->onMqttMessage(NULL);
    Serial.println("test");
    mqtt_ptr->onMqttMessage(topic, payload, properties, len, index, total);
}

static void onMqttSubscribe(uint16_t packetId, uint8_t qos) {
    Serial.println("subscribe ack");
}
}

void MyMQTT::onMqttConnectWrapper(bool sessionPresent) {
//  static_cast<MyMQTT*>(parm)->onMqttConnect(NULL);
    mqtt_ptr->onMqttConnect(sessionPresent);
}

void MyMQTT::onMqttDisconnectWrapper(AsyncMqttClientDisconnectReason reason) {
//  static_cast<MyMQTT*>(parm)->onMqttConnect(NULL);
    mqtt_ptr->onMqttDisconnect(reason);
}

void MyMQTT::reconnectTask(void* parameters) {
    while (!wifi.connected()) {
      Serial.print(".");
      vTaskDelay(1000 / portTICK_PERIOD_MS);
    }

  Serial.println("MQTT reconnecting!");
  this->connect();
  vTaskDelete(NULL);
}

void MyMQTT::cTaskWrapper(void* parameters) {
  static_cast<MyMQTT*>(parameters)->reconnectTask(NULL);
}

void MyMQTT::onMqttMessage(char* topic, char* payload, AsyncMqttClientMessageProperties properties, size_t len, size_t index, size_t total) {
  Serial.print("incoming: ");
  Serial.println(topic);
  Serial.println(payload);

  StaticJsonBuffer<200> jsonBuffer;
  JsonObject& root = jsonBuffer.parseObject(payload);
  if (!root.success()) {
    Serial.println("parseObject() failed");
    return;
  }
  if (String(topic).equals("sensor/vendingmachine/dispense")) {
    if (root.containsKey("num")) {
      shelf->dispense(root["num"]);
    }
  } else if (String(topic).equals("sensor/vendingmachine/color") || String(topic).equals("sensor/esp100/set")) {
    if (root.containsKey("color")) {
      uint8_t r = root["color"][0];
      uint8_t g = root["color"][1];
      uint8_t b = root["color"][2];
      led.changeColor(r,g,b);
    }
    if (root.containsKey("brightness")) {
      uint8_t brightness = root["brightness"];
      led.changeBrightness(brightness);
    }
  }
}

void MyMQTT::onMqttConnect(bool sessionPresent) {
  Serial.println("CONNECTED! callback works");
  subscribe();
}

void MyMQTT::onMqttDisconnect(AsyncMqttClientDisconnectReason reason) {
  Serial.println("Disconnected from MQTT.");

    xTaskCreate(
      &cTaskWrapper,          /* Task function. */
      "mqttReconnectTask",        /* String with name of task. */
      1024,            /* Stack size in words. */
      this,             /* Parameter passed as input of the task */
      tskIDLE_PRIORITY,                /* Priority of the task. */
      &mqttTaskHandle);            /* Task handle. */
}

void MyMQTT::connect(void) {
  mqtt_ptr = this;
  Serial.print("MQTT connecting");

  mqttClient.onConnect(&onMqttConnectWrapper);
  mqttClient.onDisconnect(&onMqttDisconnectWrapper);
  mqttClient.onSubscribe(&onMqttSubscribe);
  mqttClient.onMessage(&onMqttMessageWrapper);

  mqttClient.setServer(host, port);
  mqttClient.setCredentials(username, password);
  mqttClient.setKeepAlive(60);
//#if ASYNC_TCP_SSL_ENABLED
//  mqttClient.setSecure(true);
//#endif

  mqttClient.connect();

  while(!mqttClient.connected()) {
    Serial.print(".");
    delay(500);
  }

  Serial.println("MQTT connected");

}

bool MyMQTT::connected(void) {
  return mqttClient.connected();
}

void MyMQTT::subscribe(void) {
  uint16_t dispenseIdSub = mqttClient.subscribe("sensor/vendingmachine/dispense", 0);
  uint16_t colorIdSub = mqttClient.subscribe("sensor/vendingmachine/color", 0);
  uint16_t color2IdSub = mqttClient.subscribe("sensor/esp100/set", 0);
  mqttClient.publish("sensor/vendingmachine/alive", 0, true, "test");
}

void MyMQTT::publish(char* topic, char* payload) {

}

void MyMQTT::publish(char* topic, String payload) {

}